Green Big Sky, MT
Twin Tunnels drops 181 vertical feet over 2,257 feet of skiing, with a steepest pitch of 23° about 840 feet below the top. That's steeper than 96% of the 3,109 green runs we've measured in North America, and the 191st steepest of 290 named runs at Big Sky. It faces east.
Facing east at an average 6°, Twin Tunnels gets about 93% of the winter sun that flat ground at Big Sky does, December through March. That's sunnier than 64% of the runs we've measured, and the 129th sunniest named run at Big Sky. Its top sits at 8,000 feet.
With little slope to hide behind, it takes nearly the full winter sun of open ground: powder settles and turns heavy sooner after a storm, and spring snow softens early. Shading from ridges and trees isn't counted yet.
under 25°25–35°35–45°45°+ Hover to follow the line on the map.
Measured by ZRankings from 1-meter USGS lidar. Steepest pitch is the steepest stretch of about 50 vertical feet along the skiable line. Run lines come from OpenStreetMap and can sit a little off the skied path.